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IEE!.KlMIL-B-29595(AS)l.lune 1994

MILITARY SPECH?ICATION

BATTERIES AND CELIS, LITHIUM, AIRCRAFT,GENERAL SPECIFICATION FOR

This specification is approved for use by the Naval Air Systems Command, Departmentof the Navy, and is available for use by [lH Departments and Agencies of the 1.3epmtrnentofDefense.

1.SCOPE

1.1Scope.Thk specificationestablishesthegeneralrequirementsforli~hiumcellsandbatteries acceptable for use in aircra ft.

1.2 Classification. Cek and b:ltteritis ure classifiedasfollows:

a. Type I -

b. Type Ii -

c. Type ill -

Type 1coversso~id cathode primary cells or batteries. This type of cell orbatte~ includes, but is not limited to, lithium/mangw-wse dioxide[Li/MnOJ, lithium/c:~rbon moncdluoride [IJ(CF)J, lithium/irondisulfide [lJ/FeSJ and lithium/iotiine [Li/lJ electrochemic:d systems.

Type 11covers soluble cathode ~rimn~ cells or batteries This type of cello; ‘battery includes, hut is not Iihited ;o, iithium/suifur dioxide ~Li/SOz],lithium/thionyi chloride [Li/SOCLJ, and lithium/suifuryl chloride{Li/SO,Cl,] eiec[rochemicai systems.

Type !i,jcovers rechurge;ihk lithiumctilkLX bi,itt~rics.

1,.3Part or identifvirw numhtms. Thti qqpiiciihk specification sheets specify the purt oridentifying numbers for cells and kmtusries.

Beneficial comments (recom,mendutions, Aiitions, ckietions) and any pertinent data whichmay be of use in improving this document shouicl be addressed to: Crmne Division, N’avaISurface Warfare Center, Code MIX!, Bldg. 2949,300 k!ij$way 3611 Crune, IN 47522-5001, byusing the self-addressed Stand:lrdiz:ition Document lrnpmvtment l%oposa!(DD Form i426)appearing :lt the end of this document or by ktter.

AMSC N/A FSC 6135DISTRIBUTION STATEMENT A. Approvtid for public dei~se; distrihuti,on is unlimited.

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MIL-B-29595(AS)

2. APPLICABLE DOCUMENTS

2.1 Government documents.

2.1.1 Specifications. standards, and handbooks. The following specifications, standards,and handbooks form a part of this document to the extent specified herein. Unless otherwisespecified, the issues of these documents are those listed in the issue of the Department ofDefense Index of Specifications and Standards (DODISS) and supplement thereto, cited in thesolicitation (see 6.2).

SPECIFICATIONS

MILITARY

MIL-E-917

MIL-P-6063

MIL-W-6858MIL-F-14072

STANDARDS

FEDERAL

FED-STD-313

MILITARY

MIL-STD-105

MIL-STD-129MIL-STD-454

MIL-STD-81O

MIL-STD-882MIL-STD-1360

MIL-STD-2000

MIL-STD-5400

MIL-STD-45662

Electric Power Equipment, Basic Requirements(Naval Shipboard Use).Packaging of Batteries, Storage, Charged and DryUncharged and Moist, General Specification for.Welding, Resistance: Spot and Seam.Finishes for Ground Based Electronic Equipment.

Material Safety Data, Transportation Data andDisposal Data for Hazardous Materials Furnishedto Government Activities.

Sampling Procedures and Tables for Inspection byAttributesMarking for Shipment and Storage.Standard General Requirements for ElectronicEquipment.Environmental Test Methods and EngineeringGuidelines.System Safety Program Requirements.Fuses, Fuseholders, and Associated Hardware,Selection and Use of.Standard Requirements for Soldered Electrical andElectronic Assemblies.Electronic Equipment, Airborne, GeneralRequirements for.Calibration Systems Requirements,

7. ,.

●

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IW1H3-29595(AS)

‘HANDBOOKS

h41L-HEIBIK-729- Corrosion and Corrosion Prevention Metals.

(Wrdess otherwise indicated, copies of federal and military specifications, standard% andhandbooks are available from Customer Service, Standardization Documents Order DeslqDefense Printing Service, Bk.ig,.4.D, 700 Robbi,ns Avenue, Ph,iladeIphia, PA 19111,-5094.)

2.’1.2 Other Government documents, drawi,ngsj and mblkations. The following otherGovernment documentq drawings, and publications form a part of this document to the extentspectiled herein. Unless otherwise specified, the i,ssues are those cited in the solicitation.

40 cm Code of FederaJ Rqtdations, Title 40- Protection ofEnvironment

49 CFR Code of Federal Regulations,Tide49- Transportation55 FR . Federal Register, Volume 55, No. 246, Friday,

‘December 21, 1990OI?NAVINST 5090.1, - Environmental and Natural Resources Program ManualNAVAlfU”NST 5100.7 - Naval Air Systems Command Safety Programs for Explosive

Ordnance, Laser Systems, and Lithium BatteriesS93 IO-AQ-SAF-O1O - Technical Mmmd for Batteries, Navy Lithium Safety

Program Responsibilities and ‘Proceckes

—[Copies of 40 Cl?R, 49 CFR, and 55 Hl are available from the Superintendent of

Documents, United States Government Printi,ng Office, Washington, DC 20402-0001. Copies ofOPNAVINST 5090.1, NAVA.IRINST 5100.7, and S93I,O-AQ-SAF-O1O are available fromCustomer Service, Standardization Documents Order Desk, ‘Defense Printing Semicet Bldg. 4D,700 Robbins Avenu~ Philadelphia, PA 1911‘1-5094)

2.2 Order of rxecedence. In the event of a conflict between the text of this documentand the references cited herein (except for related associated detail specifications, specificationsheets, or MS standards), the text of this document, takes precedence. Nothing i,n thisdocument, however, supersedes applicable laws and regulations unless a specifi,c exemption hasbeen obtained.

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MIL-B-29595(AS)

3. REQUIREMENTS

3.1 Specificationsheets.The individualhem requirementsshallbe asspecifiedhereinand inaccordancewiththeapplicablespecificationsheet.Intheeventofanyconflictbetweentherequirementsofthisspecificationand thespecificationsheet,thelattershallgovern.

3.2 Qualification. Cells and batteries furnished under this specification shall be productswhich are authorized by the qualifying activity for listing on the applicable qualified products listat the time of award of contract (see 4.2.1 and 6.3).

3.3 Desi ~ and construction. The cell or batteryshallbe designedand constructedto

conform tothe requirementsspecifiedhereinand as specifiedin3.1.The cellor batteryshall

passallthetestsspecifiedherein.

3.4 Materials. m-ocesses, and r)arts. Materials, processes, and parts shall conform toMIL-STD-5400 except as otherwise specified herein or as waived by the procuring activity.

3.4.1 Materials. Materials shall conform to the weight restrictions, strength andperformance requirements, and environment specified herein and as specified in 3.1. Exposedparts shall be inherently corrosion-resistant or protected against corrosion.

3.4.1.1 Corrosion resistance. All metals which do not enter into the basicelectrochemical reaction of the cell shall resist corrosion or be treated to resist corrosion inaccordance with MIL-F-14072 and MIL-HDBK-729.

3.4.1.2 Dissimilar metals. When dissimilar metals contact each other, electrolysis andcorrosion which would adversely affect cell or battery performance shall be prevented inaccordance with MIL-F-14072 and MIL-HDBK-729.

3.4.1.3 Insulatin~ com~ounds. When tested in accordance with 4.9, the insulating,potting, and sealing compounds shall not flow, crack, nor draw away from the sides of acontainer at any temperature tested.

3.4.1.4Prohibitedmaterials(TvpeIonly~.CellsorbatteriesshallnotcontainanyprohibitedmaterialsasdefinedinMIL-E-917.

3.4.1.5 Material Safetv Data Sheet(s). Material Safety Data Sheets shall be provided inaccordance with FED-STD-3 13.

3.4.1.6 Jackets. The jackets (see 6.7.4) shall be a nonmetallic material. The contents ofmulti-cell batteries shall fit snugly enough in the jackets to minimize movement of the cells.When covering two or more cylindrical cells stacked end on end, jackets with an open top orbottom (or both) shall prevent the cells from slipping out. Nonmetallic jackets, whethercardboard or plastic, shall neither support combustion nor emit toxic vapors when subjected toflame. The seams of the jacket shall not open before or after any electrical or environmental

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MIL-B-29595(AS)

test to which the ceU or battery is subjected (see 4,4 through 4.9). The color of exposed surfacesof the jackets shall be green with black lettering.

3.4.2 Processes.

3.4.2.1 Finish, The outside surface of the container or jacket shall be free of dirt andsuch surface imperfections as nicks, dents, and scratches.

3.4.2.2 Fungus treatment. The celJ or battery shall be made either from fungus-inertmaterials and parts that conform to requirement 4 of MIL-STD-454 or from materials and partsappropriately treated before use so that overall spraying of the cell or battery with a fungicide isunnecessa~. Contractors may forgo the fungus tests of4,9.7 by submitting a certificate (signedby a company officiai) indicating that the cell or battery will not support fungal growth.

3.4.2.3 Welding. Al welding of cell or battery parts shall comform to MIL-W-6858.

3,42.4 Soldering. AU soldering of cell or battery parts shall conform to MIL-STD-2000.

3.5 Phvsical requirements.

3.5.1 Atmosr)heric tmeratirm conditions. The celJ or batte~ shall be capable ofperforming electrically while encountering the environments of 3,5.1.1 through 3.5.1.3.

3.5.1.1 Humidity. The operating relative humidity shall be from O percent to100 percent including condensation.

3.5.1.2 Pressure. The operating atmospheric pressure shall range from that found at sealevel to that found at an altitude of ‘1,8,500meters (see 3.1].

3.5.1.3 Temperature. The operating temperature shall be from -40”C to +55°C (see3.1).

3.5.2 Sha~e and size. The shape and size of the cell or battery shall conform to theapplicable specification sheet when measured in accordance with 4.4.1 and 4.4.2.

3.5.3 Weight. The cell or battery weight shaU be minimal, consistent with materialselection and fabrication processes necessmy to meet the environmental and performancespecikations. The ceil or battery weight shall conform to the applicable specification sheet (see3.1) when measured in accordance with 4.4.2.

3.5.4 Ceil or batterv w stem interface. The cell or batteiy system interface shall beconfigured or marked to prevent improper connection of the ce~ or battery to the equipment.The interface shall be examined in accordance with 4.4.1.

3.5.5 Labels and marking. All required labelsthroughout a,lJtests specified herein. The marking orI

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and markings sha~ be clear and legiblethe outside of each battery and on single


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MIL-B-29595(AS)

cellbatteriesshallconformto3.5.5.1through3.5.5.9(see3.1).Each cellcontainedwithina ●batteryshallbe marked asa minimum withtheterminallabeling(see3.5.5.1)and dateand lotcode(see3.5.5.5).The warningof3.5.5.6shallbe on bothbatteriesand shippingcontainers.

3.5.5.1 Terminallabeling.The positive(+) and negative(-)terminalpositionsshallbeconspicuouslyand durablymarked on thebatteryjacketorcontainer,adjacenttotheterminalsforeasyidentificationasshown on theapplicablespecificationsheets.

3.5.5.2 National stock number. Cells, batteries, and shipping containers for cells orbatteries shall be labeled with the national stock number as specified by the procuring activity.

3.5.5.3 Nominal voltage. The nominalvoltageshallbe marked on thecellorbatteryinaclearlyvisiblelocation.

3.5.5.4 Cell chemistry. The following information shall be marked on primary cells orbatteries in a clearly visible location: Cell, Primary, (Anode Material) /(Cathode Material). Thefollowing information shall be marked on secondary (rechargeable) cells or batteries in a clearlyvisible location: Cell, Rechargeable, (type of lithium electrochemistry or technology). See thebox below for an example. A hyphen (-) or blank space maybe used vice the solidus (/).

Cell, Primary,Lithium/SulfurDioxide

●3.5.5.5 Date and lot code. The date and lot code shall indicate the year and day of

manufacture along with a lot number (see 4.2.2.2 for inspection lot definition) of the cell. Thecode shall be a five-digit number followed by a hyphen and a two-digit lot number. The first twodigits shall indicate the year of manufacture and the next three digits the Julian date ofmanufacture. After the hyphen, the two digits shall indicate the lot code with 01 representingthe first lot. For example, a cell manufactured on 15 February 1994 which was part of the firstlot produced that day will bear the date and lot code 94046-0 1;a cell manufactured on 2 July1994 as part of the third lot produced that day will bear the date and lot code 94184-03.

3.5.5.6 Warnimzs. The cell, battery, or shipping container shall be marked with thefollowing warnings (see 3.1). The “Materials Under Pressure” warning shall be deleted for solidcathode cells or batteries. The warning for primary items shall be as follows:

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MM3-2959S(AS)

For Use in Designated Equipment Only

Ctmthm

Materials‘Under Pressure

Do not pierce, cannibake, mutilate, puncture, recharge, shortcircuit, expose to temperatures above S4°C, or incinerate. Use

,, in equipment approved for this celKor battmy. Do not throw in trash.u . . --

‘Ilk warning for secondary (rechargeable) items shail be as folJows:

For Use in Designated Equipment Only

Caution

Recharge in accordance with manufacturer’s instructions

Do not pierce, carmibalize, mutilate, punmture, shortcircuit! expose to temperatures above 54”C, or imcirmemte.Use

in equipment approved for this cell m battery. Do not fhmw in trash.

3.5.5.7 Comrdete dischar~e device label. Batteriw (but not single cells) shall have thefoUowing label affixed over the switch access opening of the complete discharge device. Thelabel shall be a removable 25 & 5 millimeters (width) by 50 * 5 millimeters (length) two-panellabel made of waterproof paper, paper product, orplastic material with lusterless black lettering.The label shall be centered as closely as possible over the switch access opening. The wordATTENTION in the top panel shall be in bold lettering and shall fill the available area of thetop panel. The format ~h_aUbe as follows:

ATNEN’iNiON

Before disposai,remove this label and

push switch.

3.5.5.8 Comolete discharge device card. Batteries (but not single cells) shall have acomplete discharge device card packdged in the plastic bag’cont:kining tbe b~ttery. The cardshall be placed !ettering side out over the face containing the connector. The carddimensionsshall be not greater than 76.2 millimeters by 127 millimeters. The word ATTENTION shall bein bold lettering. The printing shall be clearly legible and read as follows:

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MIL-B-29595(AS)

ATI’ENTION

This battery has a discharge switch in order to make it nonreactive.After final use, remove attention label covering the switch, push switch,

md store battery for five days. Maintain not less than a one-inch air space betweenbatteries during the storage period. Coordinate disposal with your

local environmental office/officer and Defense Reutilization and Marketing Office.State/local regulations will control disposal in your area.

3.5.5.9 Manufacturer information. The cell or battery shall be marked with themanufacturer’s name and part number.

●

3.5.6 Workmanshitz The cell or battery shall be of uniform quality and shall be freefrom defects that affect life, function, and appearance. Loose contacts, peeling, flaking orchipping of plating or finish, mechanical damage due to testing environments, nicks or burrs ofmetal parts of surfaces, or improper or incorrect marking shall not be present. Workmanshipshall conform to requirement 9 of MIL-STD-454.

3.6 Electrical reauirements.

3.6.1 ODen circuit volta~e. The cell or battery open circuit voltage shall be not greaterthan the maximum voltage specified in the applicable specification sheet when tested in

●accordance with 4.5.1.

3.6.2 Closed circuit voltage. The cell or battery closed circuit voltage shall be not lessthan the minimum voltage specified in the applicable specification sheet when tested inaccordance with 4.5.2.

3.6,3 Capacity. When the cell or battery is tested for capacity in accordance with 4.5.3,the time required to reach its specified minimum voltage at the end of discharge shall be notless than the cell or battery capacity requirement specified in the applicable specification sheet.The cell or battery temperature shall be not greater than 82°C at any time during a capacitytest.

3.6.4 Initial voltage delay. When the cell or battery is tested for capacity, the initialvoltage delay (see 6.7.3) shall be not greater than the time specified in the applicablespecification sheet when measured in accordance with 4.5.3.1.

3.7 Svstem safetv design requirements,

3.7.1 Cell construction. The cell shall incorporate a balanced chemistry (a 1:1stoichiometric ratio of anode material to cathode material) to provide a safe and reliable

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ML-B-29595(AS)

~

I

a

electrochemical system. The anode-to-cathode ratio SM be such that the anode shall beconsumed by the end of discharge.

3.7.2 Chime twotection. In batteries consisting of’series-parallel strings, each parallelstring shall be protected to prevent any possibiJ,ity of charging. If a ceil or battery is connectedto an external power source, the cell or ba,tte~ sha,U be protected so as to prevent charging lYythe fxte.rna! power source.

3.7.,2.1 Reverse current flow. Diode(s) sld be inserted in the cell, the lead to the cell,or the battery as specified in the applicable specification sheet to prevent significant reversecurrent. The diode shall conform to requirement 30 of MIL-STD-454. The diode shall have thefolfowing characteristics:

Fomard voltage drop (V~) not greater than 0.65 vohs.Reversecurrent(1~)notgreaterthan2 rndliarnperes.

3.7.2.2 ChareinE current. When the cell or battery is tested in accordance with 4.6 toensure that the diode is functioning correctly, the charging current shall be not greater than2.0 milliamperes.

3.7.3 Fuse rxotecti,on, When required by the applicable specification sheet, each cell orbattery shall, contain a fuse that opensifthecellOFbatteryisdischargedatan excessiverate.Batteries shall be fuse-protected in the ground lead of each series string. U a battery type iscomposed of more than one ieg, each individuallegshalibe fusedSi2PWd,@~Y.Each separatecircuit shall be protected. If the battery is tapped to provide different output voltages, each tapSIMMbe protected with a fuse. Specific fuse values shall conform to the applicable specificationsheet. Fuses shall be the nonreplaceable slow blow type conforming to M,l,L-STD- 1360. Whentested as specified in 4.7, the fuse shall remain closed below its rated amperage and voltage.The types of fuses acceptable for cells and batteries shall be as follows:

T

Types of fuses I‘ Cell Battery

Standardfuses Not applicable AcceptableFuse link Acceptable Acceptable

internal fuse link Acceptable Not appliciible

3.7.4 Thermal fuse. A thermal fuse shalj conform to the applicable specification sheet.When tested in accordance with 4.8, the switch shall remain closed below 82 ~ 2°C and shaijremain open above 88 * 2 ‘C. The thermal fuse shall be located as close as possible to thegeometric center of the battery or as delineated in the specifictttion sheet. For a two- orthree-ce~ in-line arrangement, the thermal, fuse shai~ be iocated between any two adjacent cells.For a cluster arrangement of three or more celk, the high temperature switch, thermal fuse, orpositive temperature coefficient (PTC) device shall be located within the cluster,

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MIL-B-29595(AS)

3.7.5 Comdete dischar~e device. This requirement shall not apply to any single cell●

battery (see 3.1). The complete discharge device shall consist of a normally open switch and aresistor connected across each battery leg in series with the switch. A single switch action shallactivate all complete discharge devices. Switch access in battery surface shall be through arectangular hole measuring 12.7 + O, -3.1 millimeters by 4.7 + O, -1.5 millimeters. The effectivehole size shall be provided if the battexy’s surface is curved. The top center of the switchplunger shall be located at the center of the slot * 1.5miUimeters.The holeshallbe coveredbya removablelabelthatmay be made ofeitherpaper,paperproducts,orplastic(see3.5.5.7).The topsurfaceoftheswitchshallbe 4.7+O,-2.3millimetersbelowtheoutersurfaceofthebatterywhere theslotk located.The switchactionshallmove notlessthan2 millimetersdownand notmore than9.5millimeters.The switchshallnotbe h thesurfaceofthebatterythatcontainstheelectricalconnector.The resistortobe usedinthecompletedischargedeviceshallbe sufficienttoprovidea C/24 dischargerateand shallconformtorequirement33 ofMIL-STD-454. None ofthebattery’sfuses,diodes,orthermalswitchesshallpreventthedischargeofanycellupon activationofthecompletedischargedevice.When thebatteryistestedinaccordancewith4.9.12toensurethatthecompletedischargedeviceisfunctioningcorrectly,thedevice shall have discharged the battery to zero volts. The battery shall thenconform to the requirements of 3.8.a through 3.8.g.

3.7.6 Potting. Cell or battery vents shall not be potted over. If potting is essential, careshall be exercised to ensure that venting shall not be obstructed. Potting shall not adverselyaffect cell or battery thermal management.

3.7.7 Pressurized cells or batteries. All internally pressurized cells shall be hermetically ●sealed and constructed so that the case-to-cover seal is a continuous weld, free from holes andother imperfections. The seal between the electrode and the cover shall be of the glass- orceramic-to-metal type and free from imperfections. Each cell, battery, and battety enclosureshall incorporate a safety venting device or be designed and manufactured so as to preclude aviolent rupture as a result of cell venting. The design and construction shall not degrade thevent.

3.7.8 Interchamzeabilitv restraints. Lithium batteries with two or more cells shall beconstructed so that they are not interchangeable with alkaline batteries used in consumerproducts such as flashlights or radios.

3.7.9 Shortimz urotection. Individual cells or batteries shall be delivered and stored withthe leads or connector plug taped, guarded, or otherwise insulated against accidental shorting.

3.7.10 Age certification. The manufacturer shall provide the following certification witheach delivery of cells or batteries:

a. The maximum age of cells or cells assembled into batteries, from the time of theirinitial manufacture to the time of their shipping date, shall be not greater than180 days.

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aN41L-B-29595(AS)

b. Batteries shall be submitted for Government testingwkhin30daysofbatte~assembly.

3.8Environmental reauiremems. The cdl or battery, when subjected to theenvironmental requirements of 3.8.1 through 3.8.’12, shall show no:

a.

b.

c.

d.

e.

f.

g“

3.8.1

Dimensionaldistortionbeyond specified limits or cracking of the case or cellheader.

It4echanical failure of any pat%.

Electrolyte leakage.

“Breakdown of insulation, stripping of meta~ plating from any component part,corrosion of metal parts, or loosening of protective coating from the cell containeror header.

Deterioration of cell or battery ic!enttiicati,on and warning markings. Charred ordiscolored areas of the celJ or battery.

Opening of battery vents.

Following the inspection of a. through f,, the cells or batteries shall be checked asspecified herein fur conformance to the electrical requirements of 3.6.1 through3.6.4. J%JSO,the cells or batteries shall have maintained the same physicalrequirement of 3,5.2 through 3.S.4 as measured before testing.

Temperature-altitude - nono~erating, After completion of thetemperature-altitude test of 4.9.1, the cell or battery shaJJ conf~rm to the requirements of 3.8.athrough 3.8.g.

3.8.2 Vibration - nono~erating. After completion of the vibration test of 4.9.2, the cellor battery shall conform to the requirements of 3.8.a through 3.8.g.

3.8.3 Vibration - onerating. The cell or battery sIAJ be subjected to the vibration testsof 4.9.3. During the foUowi.ng random and gunfire vibration tests, the fluctuation of the cell orbattery voltage shall be no? greater than 25 percent of the load vokage and shall not fall be!owthe minimum closed circuit voltage specified in the applicable specification sheet, Also, thefluctuation of the cell or battery output current shall be not greater than 25 percent of the loadcurrent.

3.8.3.1, Random vibration. The celJ or battery sha,Ube subjected to the vibration test of4.9.3.1. The celJ or battery shall operate satisfactorily during the application of the vibrationcycle. Following the vibration test, the cell or battery sha,Uconform, to the physical requirementsof 3.5.2 through 3.5.4 as measured before testing. The ce,~ or battery shall also conform to therequirements of 3,8a through 3 ,8.f.

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MIL-B-29595(AS)

3.8.3.2 Gunfire vibration. The cell or battery shall be subjected to the vibration test of ●4.9.3.2. The cell or battery shall operate satisfactorily when exposed to the vibrationrequirement of 4.9.3.2. Following the vibration test, the cell or battery shall conform to thephysical requirements of 3.5.2 through 3.5.4 as measured before testing. The cell or battery shallalso conform to the requirements of 3.8.a through 3.8.f.

3.8.4 Mechanical shock - o~erating. The cell or battery shall be subjected to the shocktestsof4.9.4and 4.9.4.1.Duringthk test,thefluctuationofthecellorbatteryvoltageshallbenotgreaterthan25 percentoftheloadvoltageand shallnotfallbelowtheminimum closedcircuitvoltagerequiredintheapplicablespecificationsheet.Also,thefluctuationoftheceLlorbatteryoutputcurrentshallbe notgreaterthan25 percentoftheloadcurrent.Aftercompletionofthistest,thecellorbatteryshallhavemaintainedthesame physicalrequirementsof3.5.2through3.5.4asmeasuredbeforetesting.The cellorbatteryshallalsoconformtotherequirementsof3.8.athrough3.8.f.

3.8.5Mechanicalshock - nono~erating. After completion of the shock tests of 4.9.4 and4.9.4.2, the cell or battery shall conform to the requirements of 3.8.a through 3.8.g.

3.8.6 Humiditv - nono~erating. After completion of the humidity test of 4,9.5, the cellor battery shall conform to the requirements of 3.8.a through 3.8.g.

3.8.7battery shall

3.8.8battery shall

3.8.9test of 4.9.8,

Salt fop - nonoperating. After completion of the salt fog test of 4.9.6, the cell orconform to the require-merits of 3.8.a through 3.8.g. -

Funws - nonoperating. After completion of the fungus test of 4.9.7, the cell or ●conform to the requirements of 3.8.a through 3.8.g.

Tem~erature shock - nonoperating. After completion of the temperature shockthe cell or battery shall conform to the requirements of 3.8.a through 3.8.g.

3.8.10 Explosive decommission - nonoperating. After completion of the explosivedecompression test of 4.9.9, the cell or battery shall conform to the requirements of 3.8.athrough 3.8.g.

3.8.11 Water immersion - nonoperating. After completion of the water immersion testof 4.9.10, the cell or battery shall conform to the requirements of 3.8.a through 3.8.g.

3.8.12 Sand and dust - nonoperating. After completion of the sand and dust test of4.9.11, the cell or battery shall conform to the requirements of 3.8.a through 3.8.g.

3.9 Safetv test recmirements. Formal safety requirements regarding lithium cells orbatteries within the Naval Air Systems Command (NAVAIR) are identified in NAVAIRINSTRUCTION 5100.7, which adopts the Naval Sea Systems Command requirements identifiedin Technical Manual S931O-AQ-SAF-O1O (see 6.9.1).

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‘MIIA3-29595@)

3.9.1 Cell or battery. The following cell or battery tests shall be performed. Violentrupture or evidence of external fire or flame shall cause the cell or battery to fail the test (see3.1). Unlessothewisespecified,ventingofelectrolyteorelectrolytevaporthroughpurposelydesignedventsk acceptable,internalpressure buiJdup shall be not greater than 50 percent ofthe yield strengthofthecellorbatteryhousing assembly.

3.9.2 Constant current discharpe and reversal. The cell or battery shall be subjected tothe constant current discharge and reversaltestof4.10.2.

3.9.3Shortcircuit.The cellorbatletyshallbe subjectedtotheshortcircuittestof4.10.3.

3.9.4FIititemperature.The cellorbatteryshallbe subjectedtothehightemperaturetestof4.10.4.

3.9.5~har~ing.l%e chargingmst of4.1,0.5shall be performed only if the cell or batteryis to be connected to an. external power source as applicable or if a battery consists ofseries-connected or series-parall,el,-mnnected strings.

3.9.6 EUectricaJ safetv device. The ceU or battery shall be subjectedtotheelectricalsafetydevicetestof4.10.6.A ce,Uorbatteryventingofanykindshallcausethecellorba~terytofatithetest.

3.’10Shelf life. After 5 years of storage at an average temperature of 25”C, the celJ orbattery shall deJiver not less than 80 percent of the capacity requirement defined by 3.6.3 whentested in accordance with 4.5.3.2.

3.11 l?acka~in~ and oacki.ng. All unit packages (including groups B and C units) shall bepackaged and packed in accordance with section 5.

4. QUALITY ASSUIAF!CIE PROVISIOIW

4.1 Resmmsibilitv for insrmction. “Unless otherwise specfled in the contract or purchaseorder, the contractor is responsible for the performance of all inspection requirements(examinations and tests) as specified herein. Except as otherwise specified in the contract orpurchase order, the contractor may use his own or any other facilities suitable for theperformance of the inspection requirements specified herein, unless disapproved by theGovernment. The Government reserves the right to perform any of the inspections set forth inthis specification where such inspections are deemed necessary to ensure supplies and servicesconform to prescribed requirements.

4.1.1 Resr)onsibilitv for comtiiance. All items shallmeet all requirements of sections 3and 5. The inspection set forth in this specification shall become a part of the Contractor’soverall inspection system or quality program. The absence of any inspection requirements in thespecification shaU not relieve the contractor of the responsibility of ensuring that all products orsupplies submitted to the Government for acceptance comply with all requirements of the

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contract.ascertaindefect ivedefective

MIL-B-29595(AS)

Sampling inspection, as part of manufacturing operations, is an acceptable practice toconformance to requirements, however, this does not authorize submission of known ●material,eitherindicatedoractual,nordoesitcommit theGovernmenttoacceptmaterial.

4.2 Classification of inspections. The inspection requirements specified herein areclassified as follows:

a. Qualification inspection. A qualification inspection shall consist of testsaccomplished on cells or batteries submitted for qualification (see 4.2.1).

b. Qualitv conformance (mouu A) inspection. The quality conformance (group A)inspection shall consist of tests conducted on production samples to determinecompliance with specification requirements and for qualification verification(groups B and C) inspection (see 4.2.2 and 4.2.3).

c. Qualification verification fgrOUDS B and Cl inspection. The qualificationverification (groups B and C) inspection shall consist of tests conducted onproduction lot samples to determine compliance with specification requirements(see 4.2.3).

4.2.1 Qualification inspection. Qualification inspection shall be performed by theGovernment on samples of cells or batteries furnished by the contractor. The samples shall berepresentative of the cells or batteries proposed to be furnished to the Government undercontract and shall not be produced with the use of any equipment or procedure not normallyused in production. Qualification inspection of these samples shall be conducted at a

●Government test facility (see 6.4) and shall consist of the examinations and tests specifiedherein. The cells or batteries will be considered qualified and will be placed on the QualifiedProducts List (QPL) upon successful completion of the qualification inspection tests. Thesetests can be found in table I of the applicable specification sheet (similar to table I of thisspecification) and shall be tested in the sequence shown on the applicable specification sheet.The cells or batteries shall be retained on the QPL as long as the sample test results fromgroups B and C continue to conform to the requirements of the specification. The cost of thequalification inspections shall be borne by the Government for the period of time required toestablish not less than two qualified contractors on the QPL except as noted in 4.2.1.3.

4.2.1.1 Inspection of cells or batteries. Samples of complete cells or batteries shall befurnished for inspection in accordance with table I of the applicable specification sheet and shallbe tested in the sequence shown on the applicable specification sheet. One unassembled cell orbattery with all of its parts shall be supplied and will be retained at the Government agencywhich did the testing.

4.2.1.2 Retention of samr)les. If the contractor becomes qualified, the sample cell orbattery on which the qualification is based will be retained at the Government agency which didthe testing as long as the contractor is qualified.

14


NfIL-IL29595(AS)

4.2.1.3Failureand retest.A qualificationsamplethatfailsanyoftheexaminationsortestsspec~~edhere~rtsha,il be cause for the Government to refuse to conductadditional@stingun~dthedefectsrevealedbytheinspectionhavebeencorrected.Withtheappmva~oftheGovernment,a retestmay be allowedwithan increaseinthenumber ofqualificationsamplesasspecifiedby thequali,fjingactivity.The costofretestingshallbebornebythecontractor.

4.2.2 CMal,itvconformance Imouo A irmmction], Eachcellor battery shall be subjectedto the examination and test requirements (group A tests) in table L

4.2.2.1 Inspection of rwoduct for delivem. The contractor shall perform the inspectionsspecified for qua~ity conformance (group A) inspection. This does not relieve the contractor ofthe responsibility for performing any additional inspection which is necessary to control thequality of the product and to ensure compliance with a,~ specification requirements. TheGovernment will review and exam i,ne the contractor’s inspection procedures and inspectionrecords. Cells or batteries produced under this specification will be accepted upon successfulcompletion of quality conformance (group A) inspection, as outlined in table I of the applicablespecification sheet, provided that the samples for groups ‘Band C have been shipped to thequalifying activity in accordance with 4.2.3.

4.2.2.2 lnsnection lot. An inspection lot sha~l be defined as the quantity of ceUsorba~~eriesof any one type chosen from a completedproduction run of ce~ls or batteries that arefully assembled and identified in accordance with 3.5.5, produced at any one place ofmanufacture on any one contract, submitted at one time for quality conformance inspection.CelJs or batteries with no more than two consecutive date codes shall appear in a particularinspection lot (see 6.7.4). A specific date and lot code shall be foundinno more than oneinspection tot.

4.2.3 qualification verification (~rouos B and C) inspection. The quali,~ing activity shallconduct groups lit and C inspectionfor qualification verification. The examination and testrequirements of groups B andC i,nspecl.ionshallbe those~istedintableIof[heapplicablespecificationsheetand shallbe performedinthesequenceshownon theapplicablespecificationsheet. W-dess otherwise specified in the contract, the Government shall bear the cost ofGovernment testing (see 6.4).

4.2.3.1 Samrde selection and shirming The Government inspector shall select samples atrandom from inspected lots representative of a!~cells or batteries that have passed qualityconformance (group A] inspections. The samples shall be in quantities specified in table I.Iandshall, not be included in the contract. lot size. The contractor shall furnish the samples at no costto the Government. The contractor shall ship sample ceils or batteries in quantities conformingto table ‘l] to the qualifjring activity. The shipment shall occur within3 working days afteracceptance of the applicable inspection lots by the Government inspector. Shipment ofinspection lots that have passed group A, inspection requirements shall be held up pendingresults ofthe first 14 days of groups B and C inspection performed on samples representingthese lots. Once quai,ified, production samples successfully passing the acceptance criteria are tobe accepted until qualification is officially rescinded.

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MIL-B-29595(AS)

4.2.3.2 Non-comdiance. A sample that fails any group B or group C test shall be cause,●

if deemed necessary by the qualifying activity, to initiate action to remove the contractor’sproduct from the applicable QPL. The qual@ing activity shall notfi the procuring agency andthe contractor of each group B or group C failure, including details of the failure and thecharacteristics affected. After notification, the contractor shall immediately investigate the causeof the failure. The contractor shall report the results of the investigation and the details of(1) the proposed corrective action to the process, materials, and components as applicable, and(2) the record of events leading to the failure in previously produced units, which the quali@ingactivity considers manufactured under the same conditions. Contractor reports shall beforwarded to the quali&ing activity for evaluation with an information copy to the procuringagency.

4.2.3.3 Inspection of me~aration for delivew. Preparation for delivery shall beexamined for conformance to section 5. The sample unit shall be one item, one package, or oneshipping container.

4.3 Inspection conditions. Unless otherwise specified, all inspections shall be performedin accordance with the test conditions specified in 4.3.1 through 4.3.7.

4.3.1 Ambient air tem~erature. Unless otherwise specified, all measurements and testsshall be made at ambient temperature (25 * 5 ‘C), ambient atmospheric pressure, and ambientrelative humidity.

4.3.2 Hizh and low temperature. Unless otherwise specified, all high and low ●temperature discharge tests shall be conducted at the temperature indicated in the applicabletest with a storage time not less than 16 hours before discharge. A tolerance of * 2.0 ‘C shallbe allowed.

4.3.3 Current tolerance. For all discharges, the current shall be maintained constantwithin +- 1 percent of the specified value at all times. Unless otherwise specified, all dischargesshall be continuous.

4.3.4 Insr)ection facilities and eauiDment. The contractor shall ensure that inspectionfacilities and equipment of sufficient accuracy, quality, and quantity are established andmaintained to perform the required inspections. Equipment used for the inspections specifiedherein shall be kept calibrated in accordance with MIL-STD-45662 by a facility acceptable to theprocuring activity.

4.3.5 Electrical indicating instruments. AU voltmeters and ammeters shall be accuratewithin * 0.5 percent of full scale reading. The range of analog type meters shall be such thatthe readings are taken on the upper half of the scale. Timers shall be accurate within* 0.5 percent. The sensitivity of voltmeters shall be not less than 5000 ohms per volt.

4.3.6 Resistance tolerance. In all tests involving discharge through a resistance, the totalcircuit resistance shall be accurate within * 1.0percent.

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NflL-:B-29595(AS)

4.3.7Secmemceoftests,The testson eachce~orbamry shallbe performedinthesequence required by the applicable spec~,ficationsheet.

4.4 Phvsical examination and test methods. The following examinations and tests shallbe performed as described below.

4.4.3, Visual and mechanical examination. Exami,ne the test samples to veri,~ that thebasic materials, component materials, parts, design, construction, marking, packaging andworkmanship meet all of, the requirements of 3,3 through, 3.1,1. TaMe 111identifies the moreprevalent workmanship defects,

4.4.2 “Dimensions and weieht, Measure and weigh the test samples to determinewhether the requirements of 3.5.2 through 3.5.4 have been met.

4.5 131ectrical tests. The following tests shall be performed as described below.

4.5,1 O~en circuit voltage. Measure and record the open circuit voltage of the testsample before and after each test. Veri& that the test sample met the requirements of 3.6.1.

4.5.2 Closed circuit volta~e. Expose the test sample to ambient temperature conditionsfor not less than 16 hours. Connect the test sample to the load specified in the applicablespecification sheet. Measure and record the closed circuit voltage of the test sample. Veri&that the test sample met. the requirements of 3.6.2.

4.5.3 Cat)aciW tests. Select test samples for capacity tests specified in the individualspecification sheet. Store and discharge the test sample at temperature conditions in accordancewith 4,.5.3.1 through 4,5.3.6, whet-e applicable. Duri,ng capacity testing, continually monitor theambient and the test samp[e temperature. Maintain not less than a 5-centimeter separationamong all testsamples that are being discharged. Measure test sample capacity from testinitiation to the first time the test sample voltage MS below the minimum closed circuit voltagespeckled in the individual specification sheet. Veri& that the test sample met the requirementsof 3.6.3. A test sample faik a capacity test when any one of the following conditions occurs:

a. The test sample dimensions exceed the maximum specified in the applicablespecification sheet.

b. AiIy evidence of’cell leakage, venting, rupturing, or fire is observed within ’24hoursafter the completion of the test.

c. Any fuse or safety device operates before the test is completed.

d. Insufficient discharge time (service) is delivered.

e. Initial voltage delay time is exceeded.

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MIL-B-29595(AS)

4.5.3.1 Closed circuit voltage and initial voltare delay. Expose the test sample to ●ambient temperature conditions for not less than 16 hours. At the start of the capacitydischarge test, monitor each test sample with an oscillographic device or equivalent. Connectthe test sample to the load specified in the applicable specification sheet. Determine and recordthe time in milliseconds required for the test sample closed circuit voltage to rise to theminimum voltage after the required loads are applied as specified in the applicable specificationsheet. Measure and record the closed circuit voltage of the test sample. Verify that the testsample met the requirements of 3.6.2 and 3.6.4. From the time the test sample is shipped bythe manufacturer to the time the closed circuit voltage and initial voltage delay test isconducted, no loads shall be applied at any time.

4.5.3.2 Ambient temperature cauacity test (20”C). Store the test sample at 20 & 2°Cfor not less than 16 hours. Discharge at a temperature of 20 * 2“C.

4.5.3.3 Low temr)erature caDacitv test (-40” C). Store the test sample at -40 * 2°C fornot less than 16 hours. Discharge at a temperature of -40 i- 2°C.

4.5.3.4Hhzh temperatureca~acitvtest(55“C].Storethetestsampleat55 & 2‘C fornotlessthan16hours.Dischargeata temperatureof55 * 2°C.

4.5.3.5 Post storage low temperature car)acitv test (-40 ‘Cl. Store the test sample at70 f 2°C for not less than 30 days before the capacity testing. Then store at a temperature of-40 + 2°C for not less than 16 hours. Discharge the test sample at a temperature of -40 * 2“C.A continuous temperature recording device shall demonstrate the accuracy of the storage ●temperature. No loads shall be applied at any time during storage before the discharge testfollowing storage. Deviations from normal conditions are permitted provided that they exist forno greater than 5 percent of the required cumulative storage periods. Orient test samples instorage to have not less than 50 percent of the cell seals at the bottom of the test samples.

4.5.3.6 Post storatze hi~h temperature ca~acitv test (55 “C). Store the test sample at70 * 2°C for not less than 30 days before the capacity testing. Then store at a temperature of55 * 2°C for not less than 16 hours. Discharge the test sample at a temperature of 55 * 2°C.A continuous temperature recording device shall demonstrate the accuracy of the storagetemperature. No loads shall be applied at any time during storage before the discharge testfollowing storage. Deviations from normal conditions are permitted provided that they exist forno greater than 5 percent of the required cumulative storage periods. Orient test samples instorage to have not less than 50 percent of the cell seals at the bottom of the test samples.

4.6 Diode breakdown test. Conduct this test immediately after the closed circuit voltagetest for the test sample. The diode breakdown test shall be performed as follows. Obtain afresh test sample. No test sample of a cell or battery shall undergo more than one test of 4.6,4.9, or 4.10. Use a direct current (DC) power supply capable of delivering not less than 2.50milliamperes. Set the power supply voltage at the manufacturer selected diode reverse voltagerating + O or -1 volts plus the voltage obtained by multiplying the number of cells in series by thefactor shown below.

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I

II

I

MIL-B-29595(AS)

a CeMvoltage I Factor to be usedt

I 12.6 V tO 4.0 V 3.051.5 V to 2.6 V 2.05 I

Use low impedance contacts to connect the power supply to the connector terminals ofseries-connected cell strings of the battery. The circuit, will force reverse current flow (charging)through the individual cell string (that is, positive to positive and negative to negative). Applythis voltage for not less than 1.0 second. The amount of current flowing shall be not greaterthan the amount specified in 3.7.2.2.

4.7 ‘Fuse test. This test shall be performed as fo!!ows. Elect,rical!y connect each fusetest sarnpie[oa DC power source and subject i,t to its maximum voltage rating. Graduallyincrease the current to the maxi,mum current rating of the fuse. Reject any fuse that opens ator below the maximum current rating. Veri$ that the fuse met the requirements of 3.7.3.

4.8 Thermal fuse test. This test sha~l,be performed as foiJows. Place each test samplein a temperature chamber at 82 ~ 2*C for not, less than 2 hours. Check each sample to verifjthat the switch or thermal fuse is closed. ,Raise t,he temperature to 88 * 2“C. After 45minut~ check each sample to verify that the switch or therma~, fuse is open. Lower thetemperature to 82 * 2°C and check each sa,mp~e after 45 minutes to verfi that the switch orthermal fuse is closed, Verify that the therm~ fuse met the requirements of 3.7.4.

4.9 Environmental tests. The following tests shall be performed as described below.Unless othenvise specified herein, test the cells or batteries to the environmental requirementsof MIL-STD-5400, class 1 equipment, Obtain a, fresh test sample for each test listed below. Notest sample of a cell or battery shalj undergo more than one test of 4.6, 4.9, or 4.10. TheGovernment qual@ing activity shall determine which test of 4.5.3.2 through 4.5.3.4 sha,ll beperformed to fulfii the 4,5.3 test requirement in the subparagraphs below.

4.9.1 Temperature-altitude test - oneratinfi test conditions. During thetemperature-altitude test, instrument the test sa,mpl,e to read voltage and current and to applythe discharge current load specified in the applicable specification sheet. Monilor the testsamp~e voltage and current for fluctuation and minimum voltage during the tests. ‘Place the testsample in an environmental chamber preheated to 55°C. One hour after the test sample hasbeen inserted, evacuate the chamber pressure to simulate the ambient vacuum condition of18,500 meters altitude, After reaching this altitude simulation, maintain the chamber at thistemperature and ahitude cundit~on for 1 hour. ‘Return the chamber to ambient conditionswithin a 15-minute period. A,fter 30 minutes at ambient conditions, remove the test sarnplefrom the chamber and inspect it in accordance with 4.4.’1and 4.4.2 to veri,@ conformance to thephysical requirements of 3.5,2 through 3.5.4 and the requirements of 3.8.a through 3.8.f. Precoola chamber to -40”C. After no less than 2 hours at ambient conditions, place the test sample inthe precooled chamber, One hour after the chamber has reached -40”C, again evacuate thechamber pressure to simulate the ambient vacuum condition of 1,8,500 meters. Maintain the


MIL-B-29595(AS)

chamberattheseconditionsfor1 hourand thenreturntoambientconditionswithina15-minuteperiod.Afternotlessthan30 minutesatambientconditions,remove thetestsample

●fromthechamberand inspecth inaccordancewith4.4.1and 4.4.2toveri~that the test samplemet the requirements of 3.5.2 through 3.5.4 and 3.8.a through 3.8.f. Next, conduct the electricaltests of 4.5.1, 4.5.3, and 4.5.3.1. Verify that the test sample met the requirements of 3.8.1.

4.9.2 Vibration - nono~eratirw test conditions. The test sample does not have to beinstrumented or discharged during this test. Subject the test sample to the vibration test curveon figure 1. Apply the vibration to the test sample in each of three mutually perpendicular axes.The test shall consist of one 30-minute logarithmic sweep from 5 Hz to 2000 Hz to 5 Hz in eachaxis. Position the control accelerometers as specified in the applicable specification sheet. Theaccelerometer measuring the highest level shall control the vibration level. After completingtests, inspect the test sample in accordance with4.4.1and 4.4.2toveri$ thath met the

requirementsof3.5.2through3.5.4and 3.8.athrough3.8.f.Next,conducttheelectricaltestsof

4.5.1,4.5.3,4.5.3.1,and 4.5.3.2.Verifythatthetestsample met therequirementsof3.8.2.

4.9.3 Vibration - o~eratin~ test conditions. During the random and gunfire vibrationtests, instrument the test sample to read voltage and current and to apply the discharge currentload specified in the applicable specification sheet. Monitor the test sample voltage and currentfor fluctuation and minimum voltage during the tests.

4.9.3.1 Random vibration. Subject the test sample to the random vibration of figure 2along each of three mutually perpendicular axes. The vibration time in each axis shall be1 hour. The spectral density average of accelerometers located on the fixture shall control thetest levels, After completion of this test, inspect the test sample in accordance with 4.4.1 and e4.4.2 to verify that it met the requirements of 3.5.2 through 3.5.4 and 3.8.a through 3.8.f. Verifythat the test sample met the requirements of 3.8.3 and 3.8.3.1.

4.9.3.2 Gunfire vibration. Subject the test sample to gunfire vibration in accordancewith MIL-STD-8 10, method 519.4. Expose the test sample to complex vibration in accordancewith figure 3 along each of three mutually perpendicular axes. Apply excitation for 10 minutesin each axis for high and low rates of gunfire for a total of 60 minutes of gunfire vibration.Individual gunfire burst time will be 3 seconds on and 7 seconds off for a period of 200 cycles.The spectral density average of accelerometers located on the fixture shall control the test levels.After completion of this test, inspect the test sample in accordance with 4.4.1 and 4.4.2 to verifythat it met the requirements of 3.5.2 through 3.5.4 and 3.8.a through 3.8.f. Veri$ that the testsample met the requirements of 3.8.3 and 3.8.3.2.

4.9.4 Mechanical shock tests. In both shock tests listed below, subject the test sample to18 impact shocks consisting of 3 shocks in opposite directions along each of 3 mutuallyperpendicular axes. Each shock shall have an acceleration value of 15 g when measured with a0.2 Hz to 250 Hz filter. The time duration of each shock shall be 11 A 1 milliseconds, and thepeak acceleration magnitude shall occur at approximately 5 milliseconds. After completing eachof the shock tests listed below, inspect the test sample in accordance with 4.4.1 and 4.4.2 toveri~ that it met the requirements of 3.5.2 through 3.5.4 and 3.8.a through 3.8.f. Additionally,

20


MIL-B-29595(AS)

performthetestsspecifiedbelowtodetermineconformanceto the requirements unique to eachshock test.

4.9.4.1 O~erating. During this shock test, instrument the test sample to read voltageand current and to apply the discharge current load specdied in the applicable specificationsheet. Monitor the test sample voltage and current for fluctuation and minimum voltage duringthis test to determine compliance with 3.8.4, After completing this test, subject the test sampieto the common tests specified in 4.9.4 and to the open circuit voltage test of 4.5.1 to veri,$conformance to 3.6.1.

4.9,4.2 Nono~erating. The test sample does not require instrumentation or dischargeduring this test. After completing this tes< subject t,he test sample to the common tests specifiedin 4.9.4 and to the electrical tests of 4.5.1., 4.5.3, and 4.5.3.1, at ambient temperature to veri@conformance to the requirements of 3.6 and 3.8.5.

4.9.5 EIumiditv test - nono~eratin~ test conditions. The test sample does not requireinstrumentation or discharge during this test. Conduct the hum idi,ty test in accordance withMHA3TD-810, method 507.3, procedure IIT, for 1,5days. After completing the humidity test,inspect the test sample in accordance with 4.4.’1,and 4.4,2 to veri,& that it met the requirementsoil 3.5.2 through 3.5.4 and 3.8.a through 3,8,f. Next,, conduct the ehztrical tests of 4.5.1, 4.5.2,and 4.5.3. Verify that the test sample met the requ,kem,ents of 3.8.6.

4.9.6 Salt fo~ test - nono~eratin~ test conditions. The test sample does not requireinstrumentation, or discharge during this test. Conduct. the salt fog test in accordance withMIL-STD-81,0, method 509.3, procedure I, followed by a drying period of 24 hours. Aftercompleting the salt fog test, inspect the test sample i,n accordance with 4.4.’1and 4.4.2 to verif)rthat-itme; therequir~mentso~3.5.2through3.5.4and 3.8.athrough3.8.f.Next,conducttheelectrical,testsof4.5.’1,4.5.2,and 4.5.3.Verifythatthetestsamplemet therequirementsof3.8.7.

4.9.7Fun~ustest-nono~eratinrtestconditions.The test sample does not requireinstrumentation or discharge during this test. if the fungus test is to be conducted (see 3.4.2.2),do so in accordance with MIL-SWD-810, method 508.3. After completing the fungus test, inspectthe test, sample in accordance with 4.4.1 and 4.4.2 to veri$ that it met the requirements of 3.5.2through 3.5.4 and 3.8.a through 3,8.f. Next, conduct the electrical tests of 4.5.1, 4.5.2, and 4.5.3.Veri,fy that the test sample met the requirements of 3.8.8.

4.9.8 Tem~erature shock test - nono~eratinp test conditions. The test sample does notrequire ~mstrumentation or discharge during this test. Conduct the temperature shock test inaccordance with MIL-STD-81,0, method 503.3, The test temperalu,re extremes shd,be -57 “C to71 “C, and the duration of exposure at each temperature shall be 4.0 +0.5, -0.0 hours. Aftercomp~eting the temperature shock test, inspect the test sample in accordance with 4.4.1 and 4.4.2to verifjr that it met the requirements of 3.5.2 through 3.5.4 and 3.8.a through 3.8.f. Next,conduct the electrical tests of 4,5.1,, 4.5.3, and 4.5,3.1. Veri,@ that the test sample met therequirements of 3.8.9.

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MIL-B-29595(AS)

4.9.9Exr)losivedecompressiontest-nonoperathuztest conditions. The test sample doesnot require instrumentation or discharge during this test. Subject the test sample to explosive ●decompression in accordance with MIL-STD-8i0, method 500.3, procedure H. The conditionssimulate a pressure change from cockpit to high altitude pressure taking place within 0.1 secondas if the pilot ejected from a pressurized cockpit at 18,500 meters. After completing theexplosive decompression test, inspect the test sample in accordance with 4.4.1 and 4.4.2 to veri~that it met the requirements of 3.5.2 through 3.5.4 and 3.8.a through 3.8.f. Next, conduct theelectrical tests of 4.5.1, 4.5.2, and 4.5.3. Verify that the test sample met the requirements of3.8.10.

4.9.10 Water immersion test - nonoueratin~ test conditions. The test sample does notrequire instrumentation or discharge during this test. Submerge the test sample in tap waterunder pressure to simulate the conditions of being in 9 meters of water for 10 minutes and then1 meter of water for 15 hours. After completing the water immersion test, inspect the testsample in accordance with 4.4.1 and 4.4.2 to verify that it met the requirements of 3.5.2 through3.5.4 and 3.8.a through 3.8.f. Next, conduct the electrical tests of 4.5.1, 4.5.2, and 4.5.3. Veri@that the test sample met the requirements of 3.8.11.

4.9.11 Sand and dust test - nonoperatintz test conditions. The test sample does notrequire instrumentation or discharge during this test. Conduct the sand and dust test inaccordance with MIL-STD-8 10, method 510.3, procedure 1. After completing the sand and dusttest, inspect the test sample in accordance with 4.4.1 and 4.4.2 to veri@ that it met therecwirements of 3.5.2 through 3.5.4 and 3.8.a through 3.8.f. Next, conduct the electrical tests of4.5:1, 4.5.2, and 4.5.3. Veri~ that the test sample ;et the requirements of 3.8.12.

4.9.12 Comulete discharge device test. Verify the location and operability of the●

complete discharge device on batteries. Remove the attention label covering the switch. Pushthe switch to discharge the batte~ at a C/24 rate to zero volts. After completing this test,inspect the test sample in accordance with 4.4.1 and 4.4.2 to verify that it met the requirementsof 3.5.2 through 3.5.5 and 3.8.a through 3.8.f. Next, conduct the electrical test of 4.5.1. Verifythatthetestsamplemet therequirementsof3.7.5.

4.10 Safetv tests. The following tests shall be performed as described below. Obtain afresh test sample for each test listed below. No test sample of a cell or battery shall undergomore than one test of 4.6, 4.9, or 4.10, Perform all safety tests with test samples as specified inthe applicable specification sheet.

4.10.1Testinstrumentation.The instrumentationforthesafetytestsshallincludesixthermocouplescapableofmeasuringandwithstandingtemperaturesup to800°C,twovoltagemonitoringleads,one setofpowerleads,and,ifneeded,a pressuretransducercapableofmeasuringpressureup to the failure pressure of the test sample. Place four thermocouplesinside the test sample in the following manner: one secured on each end of the cell or batterypack, one secured at the center of the cell or battery pack, and one in the air space surroundingthe cell or battery pack. Place and secure the remaining two thermocouples on the outside ofthe test sample 180° apart near the cell or battery pack. The pressure transducer, if needed,shall continually monitor the pressure inside the cell or battery pack housing.

22


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ML-B-29S95(AS)

4.10.2 Constant current dischartze and reversal test. Obtain aDCpower supply.Continuously monitor and record voltage, current, pressur~ and temperature. Deactivate(short) all external devices and accessible i,ntermd electrical safety devices. Perform thedischarge at the current equal to the rated value of the cell or battery pack fuse. ‘Limit thevoltage of the DC power supply to the open circuit voltage of the cell or battery pack. After thetest sample voltage reaches zero volts, continue the discharge into voltage reversa~ at the samecurrent. The duration of the voltage reversal shall equal 1.5 times the elapsed time from initialapplication of discharge current until test sample voltage reaches zero volts. Verify that the testsample met the requirements of 3.9.1 and 3.9.2. For exampl~ assume a battery pack has a fuserated at 5 amperes, and it takes 3 hours to discharge !,he battery at constant current from initialapplication of the 5 ampere Ioad until the battery voltage reaches zero volts. Therefore, thebattery would have to be discharged at 5 amperes for an additional 4.5 hours (i.e., 1.5 times3 hours) after zero volts had been reached.

4.10.3 Short circuit test, Continuously monitor and record voltage, current, pressure,and temperature. Bypass all external and accessible internal electrical safety devices and shortthe test sample through a load of not greater than 0.02 ahm. The !~acishall remain attached fornot less than 24 hours. Verify that the test sample met the requirements of 3.9.1 and 3.9.3.

4.10.4 High temmwature test. Continuously monitor and record voltage, pressure, andtemperature- Heat the tat sample at a rate of approximately 20°C rise per minute up to atemperature of 500 * 2*C or until the test sample vents, whichever occurs first. Veri@ that thetest sample. met the requirements of 3.9.1 and 3.9,4.

4.10.5 Chargirw test. Perform this test if a cell or battery consists of series-parallelstrings or if a single-point. faihre can cause the battery to be connected to an outside DC powersource. Continuously monitor and record voltage, current, pressure, and temperature.Deactivate all external and accessible internal, electrical safety devices. Discharge the testsample to remove not less than 50 percent of its capacity (see 6.7.2) at a current equal to therated fuse value. Allow the test sample to stand for not less than 72 hours and then charge itusing a DC power supply at a current equal to the fuse value to 100 percent of capacity. Limitthe voltage of the DC power supply to the cei~ or battery pack open circuit voltage or to thevoltage of the outside source, whichever is larger. Verify that the test sample met therequirements of 3.9.’1and 3.9.5.

4.10.6 Electrical safetv device test. Continuously monitor and record voltage, current,pressure, and temperature. The pass-fail criteria for this test shall be no venting of any kind.This test shall consist of constant current discharge using a DC power supply. All electricalsafety devices shall be in place and operational. ‘Perform the discharge at a current equal to85 * 5 percent of the cell or battety pack fuse va[ue. Limit the voltage of the DC power supply “to the open circuit voltage of the cell or battery pack. After the test sample voltage reacheszero volt% continue the discharge into voltage reversal at the same current. The duration of thevoltage reversal shall equal “1.5times the elapsed time from initial application of dischargecurrent until the test sample voltage reaches zero voks, Verify that the test sample met therequirements of 3.9.1, and 3,9.6. For example, assume a battery pack has a fuse rated at5 amperes, and it takes 3 hours to discharge the battery at constant current from initial

23


.,.

MIL-B-29595(AS)

application of the 5-ampere load until the battery voltage reaches zero volts. Therefore, the ●batte~ would have to be discharged at 5 amperes for an additional 4.5 hours (i.e., 1.5 times3 hours) after zero volts had been reached.

4.11 S~ecial instructions. The procuring activity reserves the right to perform anyinspection set forth in this specification when the procuring activity deems such inspectionnecessary to ensure the production item conforms to the specified requirements.

4.12 Methods of examination and inspection. All inspections shall be conducted inaccordance with Government approved procedures. When approved inspection procedures areavailable from previous contracts, they may be provided and used upon the authorization of theprocuring activity. The Government reserves the right to modify procedures or add inspectionswhen deemed necessary to ensure that the cells or batteries comply with this specification andthe specified requirements.

4.13 SRecial tests.on the specification sheet.

5. PACKAGING

Cells and batteries shall be subjected to any special tests called out

5.1 Presemation, ~acka~irw. and Dacking. Preservation and packaging shall be level A,B, or C, and packing shall be level A, B, or C as specified in MIL-P-6063 (see 6.2) and49 CFR 173.i85(se;6.11.1).

5.2 Preservation.P●

acka~imz, and rIackinp of test samples. Preservation, packaging, andpacking of qualification, first article, and groups B and C samples shall be representative of thepresemation, packaging, and packing used for production cells and batteries.

5.3 Marking. Interior packages and exterior shipping containers shall be marked on thetwo largest vertical sides with lettering not less than 13 millimeters in height as follows:ROTATE STOCK - USE OLDEST CELLS [or BATTERIES] FIRST. Additionally, thepackages and containers shall be marked in accordance with the requirements of MIL-STD-129with the date and lot code (see 3.5.5.5) included in the identification marking. A warning label(see 3.5.5.6) shall be marked on the interior packages and exterior shipping containers. Acomplete discharge device label (see 3.5.5.7) shall be affixed over the switch access opening forthe complete discharge device. A complete discharge device card (see 3.5.5.8) shall be packagedin the plastic bag containing the batte~, and the card shall be placed lettering side out over theface containing the connector. The national stock number shall be marked on the shippingcontainer (see 3.5.5.2).

5.4 Packatzing. Cells and batteries shall be packaged in accordance with the safetycontrol measure for shipment of hazardous materials on military air transports in accordancewith 49 CFR 172 and 49 CFR 173.185.

24


. .

01’

‘MHA3-29595(AS)

6. NOTES

(This section contains information of a general or explanatory nature that maybehelpfuJ, but is not mandatory,)

6.1 Intended use. The cells and batteries covered by this specification are intended foruse in supplying electrical power to equipment on hoard aircraft. Primary consideration must begiven to the safe use of a non-iithium cell or bmttxy; however, if the app~ication requires the useof a lithium cell or battery, the foUowing guidance will be considered.

6.1.1 Tym I. Type I lithium cells or batteries are preferred for all locations within theaircraft. The frequency of occurrence of violent venting or explosion of Type !, lithium cells orbatteries is improbable during normal operation. If venting does occur, the vent products arenon-toxic and non-corrosiveq they would not immediate~y endanger personnel nor cause severeequipment damage.

6.1.2 ~we 11. Type 11 lithium ceUs or bmteries are not recommended for use in cockpitor crew’ compartment areas unless appropriate eye and respiratory protection are provided.Type11lithiumcellsor batteries can be used in other areas of an aircraft only if vent productswill not contamhtate the cockpit or crew compartment areas or high priority equipment orsystems. The frequency of occurrence for violent venting or explosion of type H lithium cells orbatteries is remote during normal operation. If venting does occur, the toxic and corrosive ventproducts are likely to endanger personnel and cause severe equipment damage.

6.1.3 TvpeilT.Type111lithium cells or batteries are expected to be used in suchapplications as aircraft computer memory backup.

6.1.4 Cell or batterv selection. The smaUest possible celh or batteries must be selectedfor the mission power requirement,

6.1.5 13attem tm.sembly. In development progrnms, assembly of batteries by userpersormel must be avoided.

6.1.6 Cell or bntterv compartment. A special compartment must be designed for the ceflor battery for isolation from the electronics of the end item equipment or weapon system. Thecompartment must have no interior projections or sharp edges that could dtimage the electricalinsulation around the cel~ or batte~. The cd or battery must be secured within thecompartment to reduce shock and vibration to the levels required for end item use. Thecompartment must be designed either to provide vent paths or else contain gases emitted by aventing batte~. If vent paths are to be used, they must be identified on the compartmentdrawings. H the compartment is designed to contain the vented gas, the ciriiwings must identifythe pressure-containing capabilities of the compartment (including pressure leveI) and thecontainment desi~ns or methods.

25


...

MIL-B-29595(AS)

●6.1.7 Switches. Battery or cell switches in the end item equipment or weapon system

must be carefully selected to prevent accidental cell or battery turn-on. No switching may occurin the ground leg(s).

6.1.8 Cell or battery dissimilarity. Cells or batteries with different physicalcharacteristics, chemistries, or electrical parameters must not be used concurrently in the sameelectrical circuit.

6.2 Acquisition requirements. Acquisition documents must specify the following:

a. Title, number, and date of the specification.

b. Title,number,and dateoftheapplicablespecificationsheet.

c. Part number of cell or battery required.

d. Number of cells or batteries required.

e. Issue of DODISS to be cited in the solicitation and, if required, the specific issueof individual documents referenced (see 2.1.1 and 2.1.2).

f. Level of packaging and packing required.

& Responsibilityforinspection,ifotherthanspecified(Section4).

h. Special preparation for delivery requirements, if applicable (Section 5).

6.3 Verification ins~ection. Verification by the Government will be limited to theamount deemed necessary to determine compliance with the contract and will be limited inseverity to the definitive quality assurance provisions established in this specification and thecontract. The amount of verification inspection by the Government will be adjusted to maximizeuse of the contractor’s quality control system and the quality history of the product.

6.4 Provisions for qualification. With respect to products requiring qualification, awardswill be made only for products which are, at the time of award of contract, qualified forinclusion in the applicable Qualified Products List whether or not such products have actuallybeen so listed by that date. The attention of the contractors is called to these requirements, andmanufacturers are urged to arrange to have the products that they propose to offer to theFederal Government tested for qualification in order that they may ‘be eligible to be awardedcontracts or purchase orders for the products covered by this specification. The activityresponsible for the Qualified Products List is the Naval Air Systems Command (AIR 53624),Naval Air Systems Command Headquarters, 1421 Jefferson Davis Highway, Arlington, VA22243-5360; however, information pertaining to qualification of products may be obtained fromCrane Division, Naval Surface Warfare Center, Electronics Development Directorate,Electrochemical Power Systems Department, Code 6092, Bldg. 2949, 300 Highway 361, Crane,Indiana 47522-5001.

26


MIH?-29595(AS)

e6.5Con,forma,metocwalifieclsa,mol~.R iswu+kxstoodthatcellsorbatteriessupplied

undercontractare identicd in every respect to the qualification sample tested and foundsatisfactory, except for previously approved Government changes. Any unapproved changesfrom the qualification sample will constitute cause for rejection.

6.6 Material Safetv Data Sheets. Co,ntracti,n,g officers will identify those activitiesrequiring copies of completed Material Safety Data Sheets prepared in accordance withFED-STD-313. The pertinent Government mailing addresses for submission of data are listedin F,ED-STD-313.

6.7 Definitions. The definitions of terms used in this specification are as follows.

6.7.1 ‘Balanced electrochemistry. Balanced electrochemistry means that the ratio of thelithium to the cathode materkd is such that, under normal operating conditions, no excess anodeor cathode reactants remain after all electrochemical reactions have occurred.

6.7.2 Capacity. Capacity is determined by di,schargi,ng a ceil or battery at a constantcurrent. in amperes equ ival,ent to the rated fuse value to a voltage of zero volts.

&7.3 Initial voha~e delay. Initial voltage delay is the time required at the beginning ofdischarge for the cell or battery to reach mi,nknum voltage after the load is applied.

6.7.4 Jacket. A jacket is a noncombustible insulating layer of material used to hwdate acellorbatte~electrkally,The jacketmay alsobe usedtoencasethecomponentsofa cellorbattery.

6.$ S~ecification sheets. ‘Each specification sheet should include as a minimum thefollowing information:

a.

b.

c.

d.

e.

f.

g“

h.

i.

Type of cell or battery {see 1.2).

Part or identi&ing number (PIN) (see ‘1.3and 6.1,0.1).

Shape and size of cell or battery (see 3.5.2).

Weight (see 3.5.3).

Terminal labeling (see 3.5.5 .’1),

?vlaximum open circuit voltage (see 3.6.1).

Minimum closed circuit voltage (see 3.6.2).

Capacity requirements (see 3.6.3).

Initial voltage delay requirements (see 3.6.4).

27


.i

k.

1.

m.

n.

o.

P.

MIL-B-29595(AS)

Diode(s)insertion,ifrequired(see3.7.2). ●Fuse value required in the ground lead of each string of cells in series in thebattery (see 3.7.3).

Thermal fuse (see-3.7.4).

Table I and sequence of tests (see 4.2.1, 4.2.3, and 4.3.7).

Required loadsfor tests (see 4.5.3,4.9.3, and 4.9.4).

Position of control accelerometers (see 4.9.2).

Recommended storage temperature.

6.9 Safety.

6.9.1 Lithium cell and batterv safety. All lithium cell or battery safety testing must beconducted in accordance with the Naval Sea Systems Command (NAVSEA) Technical ManualS931O-AQ-SAF-O1O and approved by Naval Ordnance Center (Code N713). Before NavalOrdnance Center review and approval, a safety data package must be developed as specified byS931O-AQ-SAF-O 10. The lithium cell- or battery-powered system description must also beincluded.

6.9.2 Svstem testing. Lithium cell or battery safety testing is specifically designed to ●force the lithium cells or batteries into an abused condition which will most likely cause the cellsor batteries to swell, rupture (vent), catch on fire, or explode. After analyzing the safety datapackage, the Naval Ordnance Center will determine whether the lithium cells or batteries mustbe installed into the actual lithium cell- or battery-powered device or weapon system whileundergoing the abusive testing. Therefore, program managers must be aware of the necessaryhardware requirements and plan accordingly.

6.9.3 Svstem safetv. System s:ifety requirements, if required, will be in accordance withMIL-STD-882.

6.10 Armlication information. The following information is provided for use whencreating a specification sheet.

6.10.1 Part or identifvine number (PIN\. The PIN for cells and batteries acquired tothis specification is created as follows: D29595/Y-Z with “Y” representing the specification sheetnumber and “Z” indicating any variation of the cell or battery on a specific specification sheet.

6.10.2 Discharge rate. If a specific discharge current is not identified, the followingtypical values for discharge rates should be used.

28


.

MIL.B-29595(AS)

6.10.2.1 Low rate desire, Cells of bobbin construction are considered low rate becauseof their limited electrode surface. Typical capacity discharge and closed circuit voltage rates forlow rate cells are Capacity Rate (CW)/60 and C~/48$ rtxpectively.

6.10.2.2 Moderate rate desimi. Ivfodera$eratedesigned cek consist of more electrodesurface than the low rat e design and may be constructed using concentric cylinders of activeekctrode materials. Typical capacity discharge and closed circuit voltage discharge rates formoderate rate design cells are ~ 16 and Cm/8, respectively,

6.10.2.3 Hi~h rate design. Cells of spiral wound construction are considered high ratebecause of their large amount of electrode surface. Typical, capacity discharge and closed circuitvoltagedischargera@s forhigh rate design cells are Cb,4 and CJ2, respectively.

6.10.3 Volta~e delay. The voltage delay (time to achieve minimal operational voltageafter initial application of load) typically is not a problem whh Type I lithium cells or batteries.However, Type 11,lithium cells or batteries have historically exhibited voltage delay whichbecomes more severe with increased storage t~imeand temperature.

6.11 ‘Ikansuortation, Official Department of Transportation guidance is provided in49 CFR. Official Navy guidance is provided in Technical Manual S931O-AQ-SAF-O1O.

6.11.1 New ceUs and batteries. AU transportation of new lithium cells and batteries onpublic domain is controlled by federal law regulating shipment of hazardous materials. Thegeneral regulations are stated in 49 CFR 172.10’1, 173, 175.3, and 206(e)(l), while49 CFR 173.185 contains the specific regulations for lithium cells and batteries. The regulationsof 49 CFR 173.185 permit shipment of lithium cells and batteriw by highway, rati, vessel, andcargo-only aircraft provided the detailed requirements of the regulations have been met,Contractors may ship in accordance with 49 CFR 173.185, using performance-oriented packaging(see Docket HM181 in 55 FR 52402ff).

6.11.2 Used cells and batteries.A.UtransportationofusedlithiumcelLsand batteriesonpublic domain is controlled by federal law regulat~mg shipment of hazardous materials. Thegeneral regulation, as stated in 49 CFR 172.101 and 49 CFR 1’73.185,permits shipment of wastelithium ceUs and batteries to a disposal site by motor vehicle only. The transportation ofhazardous waste is reguiated by 40 CFR 263, which provides for the proper identification of thetransporter and manifesting of the waste,

6.12 Disposal. Official Navy guidance for disposal is provided in Technical ManuaiS9310-AQ-SAF-010.

6.12.1 At sea. At sea, dispose ofcellsorbatteries consumed while underway or duringashore deployment by discharge overboard in deep water (in excess of 83 meters) outside theprohibited zone (92.6 kilometers). Do not stow for shore disposal.

6.12.2 Ashore. Ashore, dispose of cells or batteries as foUows:

29


MIL-B-29595(AS)

6.12.2.1 Routine dis~osal. Remove the cells or batteries from the equipment or system.Remove the attention label covering the complete discharge device switch. Push the switch and

●store the battery for five days, ensuring that such batteries are separated from each other by notless than 25 millimeters in each direction. Upon completion of discharge and storage, tape boththe positive and negative leads of each cell or battery with electrical tape. This should be doneby first wrapping the leads end-to-end with several layers of tape, then wrapping several layersaround the body of the cell or battery. Use care when handling the cells or batteries to avoidinadvertent shorting prior to taping the leads. Place each cell or battery in its own appropriatelysized polyethylene zipper-type bag. In case electrical tape and polyethylene bags are notavailable, the box from a fresh battery may be used instead. If a sizable amount of cells orbatteries are involved, obtain a drum, polyethylene drum liner, and appropriate “Class 9“ andhazardous waste labels. Insert the proper information onto the labels and affix the labels ontothe drum. Sort the cells and batteries by chemistry. Ensure that each drum contains only onetype of chemistry (e.g., only lithium/sulfur dioxide). Place approximately 5 to 7.5 centimeters ofa non-combustible cushioning agent (such as vermiculite or equivalent) in the bottom of thedrum. DO NOT USE PIASTIC BUBBLE WRAP AS THE CUSHIONING AGENT. Place alayer of the bagged or boxed cells and batteries in the drum, followed by another layer of thecushioning agent. Do not leave any voids between the lid and the waste. Fill voids withcushioning agent. Secure the lid onto the drum. Ensure the drum is located in a cool area awayfrom personnel and flammable items. Do not store the drum for longer than the period set bylaw and regulation. The period starts on the day the first battery is placed in the drum. Turnthe cells and batteries into the local Defense Reutilization and Marketing Office in accordancewith OPNAVINST 5090.1 for disposal as a hazardous waste.

6.12.2.2 Emer~encv disuosal. Evacuate the area and notify an explosive ordnance ●disposal team (EOD), who should immediately remove cells or batteries to a safe site when thece~s or batteries are’deemed to be too hazardous for routine disposal.

6.13 Storatze. Official Navy Guidance for storage is provided inS931O-AQ-SAF-O1O.

6.14 Subiect term (kev word) listing.

AnodeCathode, liquidCathode, solidCathode, solubleComplete discharge deviceElectrochemistryLithium/carbon monofluorideLithium/iodineLithium/iron disulfideLithium/manganese dioxideLithium/sulfur dioxideLithium/sulfuryl chlorideLithium/thionyl chloride

30

Technical Manual


oI

I

MI,L-B-29595(AS)

Materkds, hazardousQualified Products ListRechargeable lithiumSafety Data PackageStorage, electricalSystems, electrochemicalTests, abusiveTests,safety

31


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MIL-B-29595(AS)

TABLE 11. Grouus B and C samde size.

II Inspection lot size I Total number of samples II

Less than 150 13

Greater than or equal to 150 I Use sampling plan inspection level S-4in accordance with MIL-STD-105

TABLE 111. Identification of defects.

Method of Defect Descriptioninspection number

Visual 1 Electrical contact surfaces obstructed by insulation, potting, orsealing compounds

Visual 2 Pitting or blow holes in the cell or battery case

Visual 3 Electrolyte leakage

Visual 4 Location and polarity of terminals not as specified

Visual 5 Corrosion

Visual 6 Particles of foreign material in insulation, potting, or sealingcompounds

Visual 7 Insulation missing or damaged

Visual 8 Welds contain blow holes, cracks, or slag inclusions

Visual 9 Crazing of glass in glass-to-metal seals

Visual 10 Burrs on cell or battery case

Visual 11 Cell or battery marking not as specified

34


MIL-B-29595(AS)

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FIGUR,E ‘1,.FJono~eratin@ vibration spectrum.

35


MIL-B-29595(AS)

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FIGURE 2. Random vibration spectrum.

36


IWL-B-29595(AS)

Peak Acceleration,G6

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2

1 Random vibrationbackground

5f2f3f ~f 5f Gf Tf 8f gf K)f 2000

Frequency,Hertz

individualgunfirebursttime 3 seconds.‘Rvo minutes total of each spectrum along each axis.

Vibrate using two fundamental frequencies: fa and fb

62.3 :Hz < fa < 74.3 HZ95.6 ‘1-lz< fb < 107.6 ~Z

For f and 2f,amplitudesareasfollows:

~ AmcdhudeFreauency Deshznation IfAmolitude 2fArmlitude

fa Fa 2.5g 3.5g

m Fb 3.5g 5.0g

Amplitudesoffrequenciesflthrought10are5.0g forfaand fb.

Random vibrationbackground:0.0045~/Elz,5 Hz -2000HzOverallg~~~:11.0

FIGURE 3. Gunfirevibrations~ectrum.

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- .-’

Custodian:Navy - AS

MIL-B-29595(AS)

CONCLUDING MATERIAL

Preparing activity:Navy - AS

(Project 6135-N256)

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